Exoskeleton power mechanism is a kind of wearable assisted robots, applied ergonomics, bionics and other related knowledge to person’s intelligence and robot physical perfection together, has huge development potential. In order to better understand the exoskeleton assisted robot development achievements and existing problems at present stage, its development was divided into steam age, the age of electricity, and the information age of three main parts, and introduced. And started from the mechanical structure, drive technology, control technology, the humancomputer interaction technology, and security technology, as exoskeletons power key technologies of the assisted robot, the present problems confronted are found, and pointed out the future development direction.